Infiniti M35/M45 Y50. Manual — part 675
DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
EC-1173
[VK45DE]
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DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
PFP:25060
Component Description
NBS005IZ
The fuel level sensor is mounted in the fuel level sensor unit.
The sensor detects a fuel level in the fuel tank and transmits a signal
to the “unified meter and A/C amp.”. The “unified meter and A/C
amp.” sends the fuel level sensor signal to the ECM through CAN
communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
●
Fuel level sensor unit and fuel pump (1)
●
Fuel pressure regulator (2)
●
Fuel tank temperature sensor (3)
On Board Diagnosis Logic
NBS005J0
NOTE:
●
If DTC P0462 or P0463 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis
for DTC U1000, U1001. Refer to
EC-865, "DTC U1000, U1001 CAN COMMUNICATION LINE"
●
If DTC P0462 or P0463 is displayed with DTC U1010, first perform the trouble diagnosis for DTC
U1010. Refer to
EC-868, "DTC U1010 CAN COMMUNICATION"
.
This diagnosis indicates the former, to detect open or short circuit malfunction.
DTC Confirmation Procedure
NBS005J1
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at ignition
switch ON.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Wait at least 5 seconds.
4.
If 1st trip DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB2707E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0462
0462
Fuel level sensor circuit
low input
An excessively low voltage from the sensor is
sent to ECM.
●
Harness or connectors
(The CAN communication line is open or
shorted)
●
Harness or connectors
(The sensor circuit is open or shorted)
●
Unified meter and A/C amp.
●
Fuel level sensor
P0463
0463
Fuel level sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
SEF195Y
EC-1174
[VK45DE]
DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT
Diagnostic Procedure
NBS005J2
1.
CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Go to
DI-22, "Fuel Level Sensor Signal Inspection"
2.
CHECK INTERMITTENT INCIDENT
Refer to
EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Removal and Installation
NBS005J3
FUEL LEVEL SENSOR
Refer to
FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
DTC P0500 VSS
EC-1175
[VK45DE]
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DTC P0500 VSS
PFP:32702
Description
NBS005J4
NOTE:
●
If DTC P0500 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to
EC-865, "DTC U1000, U1001 CAN COMMUNICATION LINE"
●
If DTC P0500 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010.
Refer to
EC-868, "DTC U1010 CAN COMMUNICATION"
The vehicle speed signal is sent to the “unified meter and A/C amp.” from the “ABS actuator and electric unit
(control unit)” by CAN communication line. The “unified meter and A/C amp.” then sends a signal to the ECM
by CAN communication line.
On Board Diagnosis Logic
NBS005J5
DTC Confirmation Procedure
NBS005J6
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Steps 1 and 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1.
Start engine (VDC switch OFF).
2.
Read “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-II. The vehicle speed on CONSULT-
II should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to
EC-1176, "Diagnostic Procedure"
If OK, go to following step.
3.
Select “DATA MONITOR” mode with CONSULT-II.
4.
Warm engine up to normal operating temperature.
5.
Maintain the following conditions for at least 50 consecutive sec-
onds.
6.
If 1st trip DTC is detected, go to
.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0500
0500
Vehicle speed sensor
The almost 0 km/h (0 MPH) signal from
vehicle speed sensor is sent to ECM
even when vehicle is being driven.
●
Harness or connectors
(The CAN communication line is open or
shorted)
●
Harness or connectors
(The vehicle speed signal circuit is open or
shorted)
●
Wheel sensor
●
Unified meter and A/C amp.
●
ABS actuator and electric unit (control unit)
ENG SPEED
1,550 - 6,000 rpm
COOLAN TEMP/S
More than 70
°
C (158
°
F)
B/FUEL SCHDL
5.4 - 31.8 msec
Selector lever
Except P or N position
PW/ST SIGNAL
OFF
SEF196Y
EC-1176
[VK45DE]
DTC P0500 VSS
Overall Function Check
NBS005J7
Use this procedure to check the overall function of the vehicle speed sensor circuit. During this check, a 1st
trip DTC might not be confirmed.
WITH GST
1.
Lift up drive wheels.
2.
Start engine.
3.
Read vehicle speed sensor signal in Service $01 with GST.
The vehicle speed sensor on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with
suitable gear position.
4.
If NG, go to
EC-1176, "Diagnostic Procedure"
Diagnostic Procedure
NBS005J8
1.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to
.
>> INSPECTION END
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